In this way, the ORC process can be carried out in an optimal manner.

A combined heat power system comprises a Rankine cycle, optionally an organic Rankine cycle, using a fluid both in gaseous phase and liquid phase.

The Rankine cycle system uses the working medium for heat cycle of the present invention.

In the present invention, a working medium for the Rankine cycle including 1-chloro-2, 3, 3, 3-tetrafluoropropene and/or 1,1-dichloro-2,3,3,3-tetrafluoropropene is used in a Rankine cycle system.

This Rankine cycle (31) shares the condenser (38) and a coolant with the refrigeration cycle of an air conditioner.

Furthermore, the Rankine cycle (3) is provided with the variable throttle valve (5) and the like.

The Rankine cycle operates in the following steps:

At least one recuperator having a hot side and a cold side is disposed in the first rankine cycle system, second rankine cycle system, or combinations thereof.

electricity generation using the Rankine power cycle.

Employed at a low-temperature end is a Rankine cycle system that resembles a thermal power cycle apparatus.

to generate electricity in a Rankine or Stirling cycle.

A method for extracting mechanical energy via a Rankine cycle using hydrofluorocarbons.

A waste heat utilization device equipped with a Rankine cycle device.

These cycles are referred to as Organic Rankine Cycle (ORC).

When an organic working fluid such as R-134a is used in the Rankine cycle, the cycle is sometimes referred to as an organic Rankine cycle (ORC).[8][9][10]